Azerbaijani is the sole official language of Azerbaijan and is spoken by the majority of its population. However, several minority languages also exist in the country, including Lezgian, Talysh, Avar, Russian, and Tat. Additionally, languages such as Tsakhur and Khinalug are spoken by a small percentage of the population.

Tat, also known as Caucasian Persian, Tat/Tati Persian, or Caucasian Tat, is a Southwestern Iranian language closely related to, but not fully mutually intelligible with Persian and spoken by the Tats in Azerbaijan and Russia. There is also an Iranian language called Judeo-Tat spoken by Mountain Jews.